100661559664 has 40 divisors (see below), whose sum is σ = 199215820800. Its totient is φ = 49251396288.

The previous prime is 100661559659. The next prime is 100661559679. The reversal of 100661559664 is 466955166001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8566177 + ... + 8577919.

It is an arithmetic number, because the mean of its divisors is an integer number (4980395520).

Almost surely, 2^100661559664 is an apocalyptic number.

It is an amenable number.

100661559664 is a deficient number, since it is larger than the sum of its proper divisors (98554261136).

100661559664 is a wasteful number, since it uses less digits than its factorization.

100661559664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23197 (or 23191 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 100661559664 in words is "one hundred billion, six hundred sixty-one million, five hundred fifty-nine thousand, six hundred sixty-four".